Recurring faults with vehicle

I bought a car on the 20 March 2026 On my way home the car had already had problems, I informed them and took it back . It’s been 2 months now and already I took the car 3 times to be fixed but yet they are failing. I told them to change the car for me but they are failing to do so . The car doesn’t have power , the key doesn’t lock . Now they want to fix it for the 4th time. I told them I don’t want the car anymore because already it’s been giving me trouble. My problem they are forcing me to keep and car and keep on fixing it than to replace the car . I really need help I can’t be paying for a car that has trouble with locking and has no power .